A device including at least one processor, and an analog-to-digital (ADC) circuit, wherein the at least one processor is configured to generate an excitation signal and provide the excitation signal to a crystal in a pierce oscillation configuration, wherein after providing the excitation signal, the ADC circuit is configured to obtain as input a signal output from the crystal and convert the signal to a digital output; the at least one processor is configured to compare the digital output of the ADC circuit to a plurality of thresholds and based on the comparisons is further configured to drive the crystal to cause the crystal to operate as a pierce oscillator and to generate a clock signal from at least of one of the comparisons.
Legal claims defining the scope of protection, as filed with the USPTO.
14. The device of claim 11, wherein the excitation signal is a periodic signal.
15. The device of claim 1, wherein the excitation signal has a frequency within five (5) percent of a crystal frequency of the crystal.
16. The device of claim 11, wherein the excitation signal has a frequency within five (5) percent of a crystal frequency of the crystal.
17. The device of claim 11, wherein the excitation signal has a frequency within two (2) percent of a crystal frequency of the crystal.
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October 28, 2022
August 27, 2024
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